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NTA Abhyas 2020

Exam: NTA Abhyas
Year: 2020
Subject: Chemistry
Chapter: Carboxylic Acid Derivatives

NTA Abhyas 2020 · Chemistry · Carboxylic Acid Derivatives

An organic compound A upon reacting with N H _ 3 gives B. On...

An organic compound A upon reacting with

N{H}_{3}

gives B. On heating, B gives C. C in presence of KOH reacts with

B{r}_{2}

to give

C{H}_{3}C{H}_{2}N{H}_{2}

. A is

Options

A $C{H}_{3} - \mathop{\mathop{C}_{|}H -}_{C{H}_{3}}COOH$
B $C{H}_{3}C{H}_{2}C{H}_{2}COOH$
C $C{H}_{3}COOH$
D $C{H}_{3}C{H}_{2}COOH$

Correct answer

D. $C{H}_{3}C{H}_{2}COOH$

Step-by-step solution

\mathop{C{H}_{3}C{H}_{2}COOH}_{A} + N{H}_{3} \to \mathop{C{H}_{3}C{H}_{2}C{O}_{2}N{H}_{4}}_{B}\overset{\Delta}{→}\mathop{C{H}_{3}C{H}_{2}CON{H}_{2}}_{C}

\overset{KOH + B{r}_{2}\left(\text{Hoffmann Bromamide}reaction\right)}{→}C{H}_{3}C{H}_{2}N{H}_{2} + {H}_{2}O

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